<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>事件处理</title>
</head>
<body>
 	<input type="button" name="btn" value="点我" onclick="alert('Hello');"/>
</body>
</html>
